Pressure applying means for spinning frames



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PRESSURE APPLYING MEANS FOR 'SfI-NNING FRAMES Filed Oct. 21, 1938 2Sheets-Sheet 1 WEST July 15, 1941.

Patented July 15,

SPINNING FRAMES George West, Whitinsville, Mass., assignor to WhitinMachine Works, Whitinsville, Mass., a corporation of MassachusettsApplication October 21, -1938, Serial No. 236,253

This-invention relates to spinning frames, such as are commonly used inthe production of cotton yarn. In such frames, the rovings are passedbetween successive pairs of drawing and top rolls by which they aredrafted to the size required to yield the, desired weight or number ofyarn.

Drafting pressure has been commonly applied to the rolls by suspendedweights, and the pressure has-been distributed in the desired ratio tothe front, middle and-back top rolls through top roll saddles to whichthe weight has been connected by a weight lever and a stirrup or strap.

It is necessary to relieve, the pressure on. the

top rolls from time to time-to permit cleaning.

of the top rollsor scouring of the drawing rolls, and it is alsodesirable, to. relieve th pressure on the top rolls when the machine isto remain idle for any considerable time. i

It is the general object of my invention to provide improved means forapplying pressure to the top rolls and for quickly and convenientlyreleasing the pressure when desired.

I also provide improved pressure-applying and pressure-releasing meanswhich leave the roller beam and creel board substantially unobstructed,so that they maybe easily kept clear of dirt and lint.

My invention further relates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claims.

Preferred forms. of the invention are shown in thedrawings, in whichFig. 1 is a sectional end elevation of pressureapplying means embodyingmy improvements;

Fig. 2 is a detail view illustrating the operation of the releasingmeans;

Fig. 3 is a detail plan view, looking in the die Fig. 11 is a frontelevation, partly in section,

and looking in the direction of the arrows II in Fig. 2.

Referring to Figs. 1 to 5, I have shown parts of a spinning frameincluding a roller beam Ill 2 Claims. (cue-135) supporting a pluralityof roll stands II which provide bearings for a front drawing roll l2, amiddle drawing roll I4 and a back drawing roll l5. Top rolls 20, 2| and22 rest on the rolls i2, 14,-. and I5 respectively, and are held forrotation in the position shown .by usual guide means not.

shown.

Top roll saddles are provided for each set of top rolls and thesecomprise front saddles25 and rear saddles 26. The-front end of the frontsaddle 25 rests on the front top roll 20 and applies; pressure thereto,while the back saddle 26 rests on the middle and back rolls 2| and 22and applies pressure to said rolls in a predetermined ratio.

The parts thus far described are of the usual construction and inthemselves .form no part of my present invention which relatesparticularly to improved means for applying pressure to the top rollsaddles and for conveniently relieving":

.top rolls, I provide a spring 30 mounted on a hook 3i which is slidablein a bracket 32 secured by'a bolt 33 to the under side of the rollerbeam [0. A collar 35 on the hook 3| forms a stop to limit downwardmovement of the hook.

The spring 30 is centered in cup washers 3B position on the hook by locknuts 38. The hook 3| extends upward through a slot 39 in the usualf- Iremovable creel board 40 and engages the lower ,7

end of a stirrup or strap 4 I side walls 46 of the lever 43.

The pin 44 also extends through slots 50 (Figs.

4 and 5) in the side walls 5| and 52 of a block53.

The block 53 is preferably made of sheet metal" with slotted end-walls54 and 55 which receive an adjusting screw 56 having a head 51 and a'collar 58. When the parts are assembled, the slotted end wall 55 extendsbetween the head 51 and the collar 58.

The side walls 5| and 52 (Fig. 5) have but turned lower flanges 59, andthe side wall 52- is pressed to the position shown in Fig. 5 after thescrew 56 has been assembled in the block. The screw 56. is threaded in alug 60 (Fig. l) on the front saddle 25 and provides means foradjusting'f the block 53 forward or rearward on the front saddle 25, tothereby increase or decrease the proportion of weight carried by thefront top roll 20.

one of which engages the under side of the bracket 32 while the otheris. held in adjusted allowing the collar 35 to engage the bracket 32..

This relieves the spring pressure, so that the front top roll 20 or theback top roll 22 may be freely removed for cleaning, or the stirrup 4imay be unhooked from the hook 3| and the front and back saddles and thestirrup 4i may then be removed as a unit, thus freeing all of the toprolls.

If desired, the releasing movement of the lever 43 maybe continued tothe dotted line position shown in 'Fig. 2, in which position the clearerboards (not shown) may bereplaced above the rolls if'the machine is tostand idle.

nected by a hook}! to the stirrup 4|, substantially as in Fig. 7.Pressure is applied to the lever ll, however, by a weight W' suspendedfrom the free end of the lever 80 by a link a.

The construction shown in Fig. 6 more closely resembles the usualcommercial structure now in use. while the constructions shown in Figs.1, '7 and 8 have the advantage of leaving the upper surface of theroller beam Ill and creel board 48 substantially unobstructed.

The construction shown in Fig. 1 has .the further advantage that thesprings 30, hooks 3| and brackets 32 may be assembled and the springsadjusted as to pressure, before these parts are inserted in the spinningframe. Accurate and uniform setting of all of the springs 30 may thus beconveniently accomplished.

All forms of my invention have the very great advantage that the toproll pressure can be re- In Figs. 6, '7 and 8 I have shown modifiedconstructions for applying pressure to the stirrup 4|. In Fig. 6 I haveshown a weight W suspended by a hook 18 from a weight lever 'll havingits front end hooked into an adjustable lever screw 12. The lever H isprovided with a hook 14 to receive the lower end of the stirrup 4|, andis also provided with a lug ll which prevents accidental disengagementof the 'stirrup fromthe lever when the 'pressure'is released. Thestirrup may be readily disengaged manually from the lever Ii, however,as shown in Fig. 10, if the stirrup and top roll saddles are to beremoved as a unit. The .eye of the hook 18 provides a shoulder it whichacts as'a stop to support the upright when the hook I4 is disengagedfrom the stirrup 4|.

This type of lever is very useful not only in the constructionhereinshown, but also in the lieved from above the rolls and withoutinterfer--v ence with either the rovings or the yarn.

Having thus described my invention and the advantages thereof. I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claims, but what I claim is: l. Pressure-applying meansfor spinning frames comprising a' stirrup, means to tension saidstirrup, a front top roll saddle, a block mounted on said saddle, meansto adjust said block longitudinally of said saddle and a tensionapplyingmember havinga pivotal lost-motion connection with said bloclfand havinga pivotal connection with the upper end of said stirrup,

said member resting upon and being supported directly by said blockindependently of said lost motion connection.

2. Pressure-applying means for the top rolls of a spinning framecomprising a stirrup, means to tension said stirrup, a front top rollsaddle, a block mounted for longitudinal adjustment on said saddle, anda lever having a pin-and-slot connection with said block and having apivotal connection with the upper end of said stirrup, said lever havinga portion directly engaging said block with a cam action to applypressure to the top rolls.

- GEORGE WEST.

